Class JavaCharStream
- java.lang.Object
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- org.eclipse.rdf4j.query.parser.sparql.ast.JavaCharStream
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- All Implemented Interfaces:
CharStream
- Direct Known Subclasses:
UnicodeEscapeStream
public class JavaCharStream extends java.lang.Object implements CharStream
An implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (with java-like unicode escape processing).
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Field Summary
Fields Modifier and Type Field Description (package private) int
available
protected int[]
bufcolumn
protected char[]
buffer
protected int[]
bufline
int
bufpos
Position in buffer.(package private) int
bufsize
protected int
column
protected int
inBuf
protected java.io.Reader
inputStream
static java.io.IOException
IO_EXCEPTION
protected int
line
protected int
maxNextCharInd
protected char[]
nextCharBuf
protected int
nextCharInd
protected boolean
prevCharIsCR
protected boolean
prevCharIsLF
static boolean
staticFlag
Whether parser is static.protected int
tabSize
(package private) int
tokenBegin
private boolean
trackLineColumn
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Constructor Summary
Constructors Constructor Description JavaCharStream(java.io.InputStream dstream)
Constructor.JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn)
Constructor.JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)
Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding)
Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn)
Constructor.JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize)
Constructor.JavaCharStream(java.io.Reader dstream)
Constructor.JavaCharStream(java.io.Reader dstream, int startline, int startcolumn)
Constructor.JavaCharStream(java.io.Reader dstream, int startline, int startcolumn, int buffersize)
Constructor.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
adjustBeginLineColumn(int newLine, int newCol)
Method to adjust line and column numbers for the start of a token.protected void
AdjustBuffSize()
void
backup(int amount)
Retreat.char
BeginToken()
Returns the next character that marks the beginning of the next token.void
Done()
Set buffers back to null when finished.protected void
ExpandBuff(boolean wrapAround)
protected void
FillBuff()
int
getBeginColumn()
Returns the column number of the first character for current token (being matched after the last call to BeginTOken).int
getBeginLine()
Returns the line number of the first character for current token (being matched after the last call to BeginTOken).int
getColumn()
Deprecated.int
getEndColumn()
Get end column.int
getEndLine()
Get end line.java.lang.String
GetImage()
Returns a string made up of characters from the marked token beginning to the current buffer position.int
getLine()
Deprecated.char[]
GetSuffix(int len)
Returns an array of characters that make up the suffix of length 'len' for the currently matched token.int
getTabSize()
boolean
getTrackLineColumn()
(package private) static int
hexval(char c)
protected char
ReadByte()
char
readChar()
Read a character.void
ReInit(java.io.InputStream dstream)
Reinitialise.void
ReInit(java.io.InputStream dstream, int startline, int startcolumn)
Reinitialise.void
ReInit(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)
Reinitialise.void
ReInit(java.io.InputStream dstream, java.lang.String encoding)
Reinitialise.void
ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn)
Reinitialise.void
ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize)
Reinitialise.void
ReInit(java.io.Reader dstream)
Reinitialise.void
ReInit(java.io.Reader dstream, int startline, int startcolumn)
Reinitialise.void
ReInit(java.io.Reader dstream, int startline, int startcolumn, int buffersize)
Reinitialise.void
setTabSize(int i)
void
setTrackLineColumn(boolean trackLineColumn)
protected void
UpdateLineColumn(char c)
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Field Detail
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staticFlag
public static final boolean staticFlag
Whether parser is static.- See Also:
- Constant Field Values
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IO_EXCEPTION
public static final java.io.IOException IO_EXCEPTION
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bufpos
public int bufpos
Position in buffer.
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bufsize
int bufsize
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available
int available
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tokenBegin
int tokenBegin
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bufline
protected int[] bufline
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bufcolumn
protected int[] bufcolumn
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column
protected int column
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line
protected int line
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prevCharIsCR
protected boolean prevCharIsCR
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prevCharIsLF
protected boolean prevCharIsLF
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inputStream
protected java.io.Reader inputStream
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nextCharBuf
protected char[] nextCharBuf
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buffer
protected char[] buffer
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maxNextCharInd
protected int maxNextCharInd
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nextCharInd
protected int nextCharInd
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inBuf
protected int inBuf
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tabSize
protected int tabSize
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trackLineColumn
private boolean trackLineColumn
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Constructor Detail
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JavaCharStream
public JavaCharStream(java.io.Reader dstream, int startline, int startcolumn, int buffersize)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.Reader dstream, int startline, int startcolumn)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.Reader dstream)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
Constructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn) throws java.io.UnsupportedEncodingException
Constructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, int startline, int startcolumn)
Constructor.
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream, java.lang.String encoding) throws java.io.UnsupportedEncodingException
Constructor.- Throws:
java.io.UnsupportedEncodingException
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JavaCharStream
public JavaCharStream(java.io.InputStream dstream)
Constructor.
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Method Detail
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hexval
static int hexval(char c) throws java.io.IOException
- Throws:
java.io.IOException
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setTabSize
public void setTabSize(int i)
- Specified by:
setTabSize
in interfaceCharStream
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getTabSize
public int getTabSize()
- Specified by:
getTabSize
in interfaceCharStream
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ExpandBuff
protected void ExpandBuff(boolean wrapAround)
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FillBuff
protected void FillBuff() throws java.io.IOException
- Throws:
java.io.IOException
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ReadByte
protected char ReadByte() throws java.io.IOException
- Throws:
java.io.IOException
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BeginToken
public char BeginToken() throws java.io.IOException
Description copied from interface:CharStream
Returns the next character that marks the beginning of the next token. All characters must remain in the buffer between two successive calls to this method to implement backup correctly.- Specified by:
BeginToken
in interfaceCharStream
- Returns:
- starting character for token.
- Throws:
java.io.IOException
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AdjustBuffSize
protected void AdjustBuffSize()
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UpdateLineColumn
protected void UpdateLineColumn(char c)
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readChar
public char readChar() throws java.io.IOException
Read a character.- Specified by:
readChar
in interfaceCharStream
- Throws:
java.io.IOException
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getColumn
@Deprecated public int getColumn()
Deprecated.Description copied from interface:CharStream
Returns the column position of the character last read.- Specified by:
getColumn
in interfaceCharStream
- See Also:
getEndColumn()
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getLine
@Deprecated public int getLine()
Deprecated.Description copied from interface:CharStream
Returns the line number of the character last read.- Specified by:
getLine
in interfaceCharStream
- See Also:
getEndLine()
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getEndColumn
public int getEndColumn()
Get end column.- Specified by:
getEndColumn
in interfaceCharStream
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getEndLine
public int getEndLine()
Get end line.- Specified by:
getEndLine
in interfaceCharStream
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getBeginColumn
public int getBeginColumn()
Description copied from interface:CharStream
Returns the column number of the first character for current token (being matched after the last call to BeginTOken).- Specified by:
getBeginColumn
in interfaceCharStream
- Returns:
- column of token start
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getBeginLine
public int getBeginLine()
Description copied from interface:CharStream
Returns the line number of the first character for current token (being matched after the last call to BeginTOken).- Specified by:
getBeginLine
in interfaceCharStream
- Returns:
- line number of token start
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backup
public void backup(int amount)
Retreat.- Specified by:
backup
in interfaceCharStream
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ReInit
public void ReInit(java.io.Reader dstream, int startline, int startcolumn, int buffersize)
Reinitialise.
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ReInit
public void ReInit(java.io.Reader dstream, int startline, int startcolumn)
Reinitialise.
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ReInit
public void ReInit(java.io.Reader dstream)
Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
Reinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream, int startline, int startcolumn, int buffersize)
Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding, int startline, int startcolumn) throws java.io.UnsupportedEncodingException
Reinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream, int startline, int startcolumn)
Reinitialise.
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ReInit
public void ReInit(java.io.InputStream dstream, java.lang.String encoding) throws java.io.UnsupportedEncodingException
Reinitialise.- Throws:
java.io.UnsupportedEncodingException
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ReInit
public void ReInit(java.io.InputStream dstream)
Reinitialise.
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GetImage
public java.lang.String GetImage()
Description copied from interface:CharStream
Returns a string made up of characters from the marked token beginning to the current buffer position. Implementations have the choice of returning anything that they want to. For example, for efficiency, one might decide to just return null, which is a valid implementation.- Specified by:
GetImage
in interfaceCharStream
- Returns:
- token image as String
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GetSuffix
public char[] GetSuffix(int len)
Description copied from interface:CharStream
Returns an array of characters that make up the suffix of length 'len' for the currently matched token. This is used to build up the matched string for use in actions in the case of MORE. A simple and inefficient implementation of this is as follows : { String t = GetImage(); return t.substring(t.length() - len, t.length()).toCharArray(); }- Specified by:
GetSuffix
in interfaceCharStream
- Returns:
- suffix
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Done
public void Done()
Set buffers back to null when finished.- Specified by:
Done
in interfaceCharStream
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adjustBeginLineColumn
public void adjustBeginLineColumn(int newLine, int newCol)
Method to adjust line and column numbers for the start of a token.
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getTrackLineColumn
public boolean getTrackLineColumn()
- Specified by:
getTrackLineColumn
in interfaceCharStream
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setTrackLineColumn
public void setTrackLineColumn(boolean trackLineColumn)
- Specified by:
setTrackLineColumn
in interfaceCharStream
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